It's fine to complain about the ticket pricing structure. But that's not what you are doing. You are also trying to claim that it is morally correct to explicitly violate the license of the admission tickets. I don't know what moral framework you follow, but I'm not aware of any such framework (other than perhaps "Anarchist") that would suggest that is morally acceptable. Then, when people point this out to you, you say that all you are doing is "complaining."
That's just bait-n-switch debating, and you shouldn't be surprised that you've been called on it.
But, sure, complain away. After all, we could go back to the old parkhopper days, where the per-day difference was never more than $5 or $10 a day. And, in that case, you were probably right: WDW made just about the same $$$ on shared tickets as they did when everyone bought their own.
But, we have a new pricing structure, clearly designed to provide incentive to stay five days or longer. You don't like it. That's fine. Don't go. After all, a big money-hungry corporation like Disney only understands one thing, so vote with your pocketbook!